首页|不同氮源处理对4个木薯品种幼苗生长发育的影响

不同氮源处理对4个木薯品种幼苗生长发育的影响

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为了探究不同形态的氮源对不同品种木薯(Manihot esculenta)幼苗生长发育的影响及其差异性,以'CH16'、'SC16'、'SC205'和'17Q'等 4个木薯品种作为试验材料,设置了-N、NO3-、NH4+三种不同氮源,围绕4个木薯品种的生长状况、氮含量、根系形态、氮积累量、氮素利用效率等特征展开研究.结果表明:在NaNO3(3 mmol·L-1),NH4Cl(3 mmol·L-1)处理下,'SC205'、'17Q'对铵态氮的氮素利用效率相对较高,属于喜铵品种,'SC16'和'CH16'对硝态氮和铵态氮的利用效率和喜好性无差异;在无氮条件下,'17Q'和'SC16'耐低氮胁迫能力相对较强,是氮高效品种,而'SC205'和'CH16'耐低氮胁迫能力相对较弱,是氮低效品种,其中,'CH16'的耐低氮能力最弱.
Effects of different nitrogen sources on seedling growth and development of four cassava varieties
In order to explore the effects of different nitrogen sources on the growth and development of different cassava varieties and their differences,three different nitrogen sources,namely-N,NO3-and NH4+,were used to treat four cassava varieties,'CH16','SC16','SC205'and'17Q',in the experiment.The growth status,nitrogen content,root morphology,nitrogen accumulation and nitrogen use efficiency of four cassava varieties were observed and analyzed.The results showed that under the treatment of NaNO3(3 mmol·L-1)and NH4Cl(3 mmol·L-1),the cassava varieties'SC205'and'17Q'had a relatively higher nitrogen utilization efficiency for ammonium nitrogen,belonging to the ammonium preferred varieties,while'SC16'and'CH16'had no difference in nitrogen utilization efficiency and preference for nitrate nitrogen and ammonium nitrogen.Under the condition of no nitrogen,'17Q'and'SC16'were nitrogen efficient cultivars with relatively high resistance to low nitrogen stress,while'SC205'and'CH16'were nitrogen inefficient cultivars with relatively low resistance to low nitrogen stress,among which'CH16'had the lowest tolerance to low nitrogen.The study lays the foundation for genetic improvement of nitrogen use efficiency and scientific fertilization in cassava agricultural production.

cassavanitrogen freenitrate nitrogenammonium nitrogennitrogen use efficiencygrowth and development

赵金铃、潘晋龙、吴宇垚、韩昊祥、张怀方、陈新、曾长英

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海南大学热带作物学院,海口 570228

中国热带农业科学院热带生物技术研究所,海口 571101

木薯 无氮 硝态氮 铵态氮 氮素利用效率 生长发育

国家自然科学基金地区科学基金国家自然科学基金地区科学基金国家重点研发计划子课题海南大学科研启动费项目海南省自然科学基金高层次人才项目国家木薯产业技术体系建设项目品种改良岗位科学家项目

32060714322605092018YFD1000500RZ21000031862019RC042CARS11-HNCX

2024

10.15886/j.cnki.rdswxb.20230018

热带生物学报
海南大学

热带生物学报

CSTPCD
影响因子：0.406
ISSN：1674-7054
年,卷(期)：2024.15(1)
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